Darwinism and Practice

Practical correlates of Micro-evolution and Macro-evolution are selective breeding and cross-breeding, respectively.  But, perhaps because of the horrors of Mengele, the subjects of such experimentation are flora and other fauna, rather than humans.  So, the dimension of Darwinism that has had the greatest impact on human society is its evidence that calls into question the contentions of works such as the first three chapters of Genesis.  For, it thereby has been tending to undermine practices that such passages have been engendering for centuries, e. g. the way humans relate to the rest of the world, the status of Labor, male-female relations, etc.  In other words, contrary to Marx's juxtaposition, it has been by interpretating the world that Darwinism has been most effective in changing it.